80165605 has 16 divisors (see below), whose sum is σ = 104212080. Its totient is φ = 58848768.

The previous prime is 80165551. The next prime is 80165623. The reversal of 80165605 is 50656108.

It can be written as a sum of positive squares in 8 ways, for example, as 134689 + 80030916 = 367^2 + 8946^2 .

It is a cyclic number.

It is not a de Polignac number, because 80165605 - 2¹⁵ = 80132837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7681 + ... + 14809.

It is an arithmetic number, because the mean of its divisors is an integer number (6513255).

Almost surely, 2^80165605 is an apocalyptic number.

It is an amenable number.

80165605 is a deficient number, since it is larger than the sum of its proper divisors (24046475).

80165605 is a wasteful number, since it uses less digits than its factorization.

80165605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 80165605 is about 8953.5247249338. The cubic root of 80165605 is about 431.1840540484.

The spelling of 80165605 in words is "eighty million, one hundred sixty-five thousand, six hundred five".